AIPMT 2012 Mains | NEET Year Wise Previous Years Questions

Biology

Chemistry

1. The orbital angular momentum of a p-electron is given as 2. During change of O2 to O$$_2^{ - }$$ ion, the electron adds on which one of the following orbitals ? 3. Four diatomic species are listed below. Identify the correct order in which the bond order is increasing in them 4. A certain gas takes three times as long to effuse out as helium. Its molecular mass will be 5. For real gases van der Waals equation is written as $$\left( {p + {{a{n^2}} \over {{V^2}}}} \right)$$ (V $$-$$ nb) = n R 6. Equal volumes of two monoatomic gases, A and B at same temperature and pressure are mixed. The ratio of specific heats ( 7. Given that the equilibrium constant for the reaction, 2SO2(g) + O2(g) $$\rightleftharpoons$$ 2SO3(g) has a value of 27 8. Given the reaction between 2 gases represented by A2 and B2 to give the compound AB(g), A2(g) + B2(g) $$\rightlefthar 9. Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne? 10. In the replacement reaction The reaction will be most favourable if M happens to be 11. Which of the following compounds can be used as antifreeze in automobile radiators? 12. Consider the reaction : RCHO + NH2NH2 $$ \to $$ RCH $$=$$ N $$-$$ NH2 What sort of reaction is it? 13. Which of the following compounds will give a yellow precipitate with iodine and alkali? 14. Consider the following reaction The product A is 15. An organic compound (C3H9N) (A), when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming 16. Which one of the following sets forms the biodegradable polymer? 17. Structure of a mixed oxide is cubic close packed (ccp). The cubic unit cell of mixed oxide is composed of oxide ions. On 18. Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 25oC are 200 mm Hg and 41.5 mm Hg respectively. Va 19. Standard reduction potentials of the half reactions are given below : F2(g) + 2e$$-$$ $$ \to $$ 2F$$-$$(aq) ;  & 20. The Gibb's energy for the decomposition of Al2O3 at 500oC is as follows $${2 \over 3}$$ Al2O3 $$ \to $$ $${4 \over 3}$ 21. Molar conductivities $$\left( {\Lambda _m^o} \right)$$ at infinite dilution of NaCl, Hcl and CH3COONa are 126.4, 425.9 a 22. Activation energy (E$$a$$) and rate constants (k1 and k2) of a chemical reaction at two different temperatures (T1 and T 23. In which of the following arrangements the given sequence is not strictly according to the property indicated against it 24. Which one of the following does not correctly represent the correct order of the property indicated against it? 25. Four successive members of the first series of the transition metals are listed below. For which one of them the standar 26. The catalytic activity of transition metals and their compounds is ascribed mainly to 27. Which of the following exhibits only + 3 oxidation state? 28. Chloroamphenicol is an 29. Low spin complex of d6-cation in an octahedral field will have the following energy 30. Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II). Which of the follow

Physics

1. The dimensions of $${\left( {{\mu _0}{\varepsilon _0}} \right)^{ - 1/2}}$$ are 2. A stone is dropped from a height h. It hits the ground with a certain momentum P. If the same stone is dropped from a he 3. A car of mass m starts from rest and accelerates so that the instantaneous power delivered to the car has a constant mag 4. A circular platform is mounted on a frictionless vertical axle. Its radius R = 2 m and its moment of inertia about the a 5. A car of mass m is moving on a level circular track of radius R. If $$\mu $$s represents the static friction between the 6. The moment of inertia of a uniform circular disc is maximum about an axis perpendicular to the disc and passing through 7. Three masses are placed on the x-axis : 300 g at origin, 500 g at x = 40 cm and 400 g at x = 70cm. The distance of the c 8. If $${v_e}$$ is escape velocity and $${v_o}$$ is orbital velocity of a satellite for orbit close to the earth's surface, 9. Which one of the following plots represents the variation of gravitiational field on a particle with distance r due to a 10. A slab of stone of area 0.36 m2 and thickness 0.1 m is exposed on the lower surface to steam at 100oC. A block of ice at 11. An ideal gas goes from state A to state B via three different processes as indicated in the P-V diagram. If Q1, Q2, Q3 12. The equation of a simple harmonic wave is given by y = 3 sin$${\pi \over 2}$$(50t $$-$$ x), where x and y are in metre 13. A train moving at a speed of 220 m s$$-$$1 towards a stationary object, emits a sound of frequency 1000 Hz. Some of the 14. A parallel plate capacitor has a uniform electric field E in the space between the plates. If the distance between the p 15. Two metallic spheres of radii 1 cm and 3 cm are given charges of $$-$$1 $$ \times $$ 10$$-$$2 C and 5 $$ \times $$ 10$$ 16. The power dissipated in the circuit shown in the figure is 30 watts. The value of R is 17. A cell having an emf $$\varepsilon $$ and internal resistance r is connected across a variable external resistance R. As 18. A proton carrying 1 MeV kinetic energy is moving in a circular path of radius R in uniform magnetic field. What should b 19. A magnetic needle suspended parallel to a magnetic field requires $$\sqrt 3 J$$ of work to turn it through 60o. The torq 20. The instantaneous values of alternating current and voltage in a circuit are given as $$i = {1 \over {\sqrt 2 }}$$ sin 21. In a coil of resistance 10 $$\Omega $$, the induced current developed by changing magnetic flux through it, is shown in 22. The ratio of amplitude of magnetic field to the amplitude of electric field for an electromagnetic wave propagatting in 23. For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material 24. A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its enf 25. Two radiations of photons energies 1 eV and 2.5 eV, successively illuminate a photosensitive metallic surface of work fu 26. If the momentum of an electron is changed by P, then the de Broglie wavelength associated with changes by 0.5%. The init 27. The transition from the state n = 3 to n = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiatio 28. The half life of a radioactive nucleus is 50 days. The time invertal (t2 $$-$$ t1) between the time t2 when $${2 \over 3 29. The input resistance of a silicon transistor is 100 $$\Omega $$. Base current is changed by 40 $$\mu $$A which results i 30. To get an output Y= 1 in given circuit which of the following input will be correct ?

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

Given that the equilibrium constant for the reaction,
2SO_2(g) + O_2(g) $$\rightleftharpoons$$ 2SO_3(g)
has a value of 278 at a particular temperature. What is the value of the equilibrium constant for the following reaction at the same temperature ?
SO_3(g) $$\rightleftharpoons$$ SO_2(g) + $${1 \over 2}$$ O_2(g)

1.8 $$ \times $$ 10^$$-$$3

3.6 $$ \times $$ 10^$$-$$3

6.0 $$ \times $$ 10^$$-$$2

1.3 $$ \times $$ 10^$$-$$5

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

Given the reaction between 2 gases represented by A₂ and B₂ to give the compound AB_(g),

A₂(g) + B_2(g) $$\rightleftharpoons$$ 2AB_(g)

At equilibrium, the concentration of
A₂ = 3.0 $$ \times $$ 10^$$-$$3 M, of B₂ = 4.2 $$ \times $$ 10^$$-$$3 M, of AB = 2.8 $$ \times $$ 10^$$-$$3 M
If the reaction takes place in a sealed vessel at 527^oC, then the value of K_c will be

2.0

1.9

0.62

4.5

AIPMT 2012 Mains

MCQ (Single Correct Answer)

-1

Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?

NaNH₂

HCl

O₂

Br₂